G/L account type not supported in multiple house bank account linkages.

What causes this issue?

You are trying to link the bank account to more than one house bank
account under the category <LS>Central System: House Bank Account</>. At
least one of the linked house bank accounts is associated with a G/L
account of the type <LS>Bank Reconciliation Account</>.

System Response

How to fix this error?

When a house bank account is associated with a G/L account of the type
<LS>Bank Reconciliation Account</>, it can be linked to a bank account
only in a one-to-one relationship when the linkage category is
<LS>Central System: House Bank Account</>. To fix the error, do either
of the following:
If you want to link the bank account to multiple house bank accounts,
change the G/L account type <LS>Bank Reconciliation Account</> to
another type in all affected house bank accounts.
If you want to continue using a house bank account with the G/L account
type <LS>Bank Reconciliation Account</>, remove all other house bank
accounts under the category <LS>Central System: House Bank Account</>.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.